Adjustable chair



y 1952 c. J. J. KUEBLER I 2,603,275

ADJUSTABLE CHAIR Filed Jan. 26, 1948 Carl J. J. Kueb/er INVENTOR.

Patented July 15, 1952 ()FF-ICE ADJUSTABLE CHAIR Carl J. J. Kuebler,Evansville, Ind.

Application January 26, 1948, Serial No. 4,372 1 This invention relatesto similar subject matter of my co-pending application, Ser, No.772,046, filed September 4th, 1947, now Patent No. 2,486,- 716, forAdjustable Comfort Chair.

An object of this invention is to selectively raise and lower the chairback of a substantially conventional chair and maintain the back in theselected raised and lowered positions.

Another object of this invention is tolock a pair of. arms which aresecured to a chair back in selected positions relative to the base ofthe chair by means of the engagement of a selected tooth in each armwith a protuberance extending within a slot provided in a suitablehousing attached to the chair base.

Another object of this invention is to restrict the travel of the armsrelative to the housing.

A still further object of this invention is to pivot the chair back andarms in the slot in the housing about a pin as an axis, which pinextends through a suitable opening formed in the arms and by so pivotingthe arms release the protuberance from the selected tooth and also bypivoting the arms in the opposite direction, engage the arms with theprotuberance by means of a second selected tooth.

A still further object of this invention is to arrange the pin andprotuberance in non-horizontal alignment in order that the normalseating on the chair and resting against the back rest will urge thearms to the latched position.

Other objects and features of novelty will become apparent to thoseskilled in the art, in following the description of the preferred formof the invention, illustrated in the accompanying drawings, wherein;

Figure 1 is an elevational side view of a typical chair having theinvention associated therewith;

Figure 2 is an enlarged elevational view of the preferred form of theinvention, portions being broken away in sections to illustrate detailsof construction, and;

Figure 3 is a sectional view taken substantially on a line 33 of Figure2 and in the direction of the arrows.

This invention has been provided in order to supply a device foradjusting the back rest of a chair in one direction. It is within thepurview of the invention to raise and lower the back rest by pivotallyactuating the same and then lifting, and maintaining the back rest inthe selected raised or lowered position.

A simplified mechanism is one of the intentions of the present inventionwhereby a simple maneuver is utilized for the adjusting operation. As

3 Claims. (Cl. 155-158) is seenin Figure l the invention isillustrated.as beingattached to the exterior surfaces of certain selectedchairelements. However, this type of chair has been illustrated in, order tobest show the invention. It is within the view of the invention toutilize the same in association. with chairs having upholsterytherearou-nd for covering the mechanical elements ofthe invention.

Referring to Figure l a chair generally indicated at I0 is provided witha base support 12 and an angularly projecting support; I l extendingfrom the rear portion of the base. A back is supplied and indicated atIt and of course, suitable cushions may be utilized in association withthe chair.

A rocker foundation i8 is supplied in association with the chair and hasan arcuate work surface thereon. A rocker rail 20 is secured to eachside of the base 12 for engagement with the arcuate rail surface andfeet 22 may be supplied in association with the base in order to limitthe travel of the base on the rocker foundation l8.

Attention is now directed primarily to Figure 2 wherein a portion of thehousing generally indicated at 24 is illustrated. This housing iscomposed of a pair of plates 26 and 28 respectively which are separatedby means of spacer bars 36 and 32. Screws 34, rivets or the like extendthrough suitable apertures in the spacers 3H and 32, and two plates 28and 26 respectively. Of course, the screws then terminate in the base l2for anchoring purposes.

A slot 35 inclined relative to a horizontal datum is formed in thehousing by the above described structure and an arm 38 is slidablyreceived in the inclined slot. This arm is attached to the back !6through the medium of conventional screws or the like and has aplurality of teeth 40 formed thereon. These teeth are selectivelyengageable with a protuberance 42 for looking or latching purposes.

The said protuberance 42 is formed in the housing 24 and projects withinthe slot 36. A pin 44 which is in non-horizontal alignment with theprotuberance extends through the aperture or slot 36 and terminates inthe end plates 26 and 28.

The pin 44 has an elongated opening 46 positioned thereon, whichelongated opening is formed in the said arm 38. By this expedient thearm 38 and consequently the chair back may be pivoted about the pin 44as an axis and while pivoting in one direction the protuberance 42 isdisengaged with the selected teeth 40. The chair back may thus be raisedor lowered.

While pivoting the arm 38 and consequently the chair back I6 in theopposite direction, the selected tooth is rendered engageable with theprotuberance 42 for locking purposes.

From the foregoing a clear understanding of the structure and operationof the invention is quite apparent. It is obvious, however, thatvariations may be made without departing from the spirit of theinvention.

Having described the claimed as new is:

1. In a chair including a base having an angularly projecting backsupport forming a stop, a back, and means attached to said back and thebase for maintaining said back in selected raised positions, said meansincluding a housing having a slot and secured to the base, aprotuberance in said housing and extending in said slot, an arm securedto said back slidably disposed in and passed through said slot, teethprojecting from one edge of said arm engageable with said protuberance,means for restricting the travel of said arm relative to said housingsaid restricting means comprising a pin in said housing and extendingacross said slot, and said arm being formed with an elongated openingand said pin being passed through said opening.

2. The combination of claim 1, and said pin being positioned innon-horizontal alignment with said protuberance whereby the arm ispivoted about said pin as an axis to selectively engage and disengagesaid protuberance with said teeth.

3. In a chair which includes a seat base and a back rest, means fixingsaid back rest to said base for selected vertical adjustment, said meanscominvention, what is prising a slot in said housing and passed throughopposite ends thereof, a protuberance disposed in a vertical plane and.projecting inwardly of said slot, a fiat arm secured to said back restand projecting therebelow, said arm being disposed in said slot andhaving an elongated aperture therein, teeth formed on one edge of saidarm and releasably engageable by said protuberance to hold said arm inselected positions, a pin passed through said aperture in said arm andthrough said slot in said housing pivotally mounting said arm in saidhousing and providing for restricted vertical movement of said arm withrespect to said housing, and said pin having its longitudinal axis in aplane perpendicular to the plane having said protuberance therein.

CARL J. J. KUEBLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 121,470 Hankin Dec. 5, 1871204,207 Edgar May 28, 1878 659,411 McAuley Oct. 9, 1900 1,256,856Wittwer Feb. 19, 1918 1,306,738 Beasant June 17, 1919 1,473,541Berninghaus Nov. 6, 1923 1,596,316 Singleton Aug. 17, 1926 2,091,733Hemminger Aug. 31, 1937 FOREIGN PATENTS Number Country Date 538,255Great Britain July 25, 1941

